Amorphophallus tuber disease& sulphur

From: Rand Nicholson writserv at nbnet.nb.ca> on 2003.02.18 at 11:44:45(9992) Scott; I do not have paeoniifolius unfortunately(I only wish), however I do have various species of bulbs, tuber and rhizomes, aroid & non-aroid, and have used sulphur on all of them for fungal and bacterial disease with a good amount of success. Fungus can be difficult inasmuch as you need to get all the mycorrhizae out of the tuber as the sulphur will only act on the surface of the cut part. You may need to cut deeper into what appears to be healthy flesh and drying the tuber (the newly cut surface) fairly quickly in low humidity has also been important in my experience. Perhaps there are others here with hands-on experience with paeoniifolius that may wish to chime in? Rand +More Rand: Thanks for your reply.. so this technique (sulfur) has worked with paeoniifolius also? Because I have actually cut away the necrotic tissues and treated it with a fungicide paste, only to have the disease progress.. Is sulfur considering fungicidal? D. Scott Taylor, Ph.D.

From: "Ron" ronlene at adelphia.net> on 2003.02.18 at 15:47:38(9995) Hi, I noticed that you mentioned "Mycorrhizae" as the cause of the tuber rot. I am not aware that the mycorrhizae fungus has a negative effect on tubers or roots. If it does, I would like to know about it. Ron +More ----- Original Message ----- To: Sent: Tuesday, February 18, 2003 6:44 AM Subject: Re: [aroid-l] Amorphophallus tuber disease& sulphur > Scott; > > I do not have paeoniifolius unfortunately(I only wish), however I do > have various species of bulbs, tuber and rhizomes, aroid & non-aroid, > and have used sulphur on all of them for fungal and bacterial disease > with a good amount of success. Fungus can be difficult inasmuch as > you need to get all the mycorrhizae out of the tuber as the sulphur > will only act on the surface of the cut part. You may need to cut > deeper into what appears to be healthy flesh and drying the tuber > (the newly cut surface) fairly quickly in low humidity has also been > important in my experience. Perhaps there are others here with > hands-on experience with paeoniifolius that may wish to chime in? > > Rand > > > > >Rand: Thanks for your reply.. so this technique (sulfur) has worked with > >paeoniifolius also? Because I have actually cut away the necrotic tissues > >and treated it with a fungicide paste, only to have the disease progress.. > >Is sulfur considering fungicidal? > > > >D. Scott Taylor, Ph.D. > >

From: Rand Nicholson writserv at nbnet.nb.ca> on 2003.02.20 at 14:12:52(10002) Hi Again: Oops. Good eyes Ron. That should read "... you need to get all the _mycelia_ out of the tuber ..." , that being the vegetative part of the fungus consisting of fine threadlike hyphae that can invade good tissue and help break it down incurring further necrosis. Hi, I noticed that you mentioned "Mycorrhizae" as the cause of the tuber rot. I am not aware that the mycorrhizae fungus has a negative effect on tubers or roots. If it does, I would like to know about it. Ron +More ----- Original Message ----- To: Sent: Tuesday, February 18, 2003 6:44 AM Subject: Re: [aroid-l] Amorphophallus tuber disease& sulphur Scott; I do not have paeoniifolius unfortunately(I only wish), however I do have various species of bulbs, tuber and rhizomes, aroid & non-aroid, and have used sulphur on all of them for fungal and bacterial disease with a good amount of success. Fungus can be difficult inasmuch as you need to get all the mycorrhizae out of the tuber as the sulphur will only act on the surface of the cut part.

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